Mutt! FYYFF!
So I'm about 6k miles into using this thing and overall, I'm very happy.
It is a joy to load and unload, and just as I hoped, having effectively 3x the tailgate area is 3x as useful when you are cooking or getting dressed or etc. There's a bit of wind noise from between the cab and the box, I'm going to install my RTT this weekend and I hope that fixes it.
A few things I think other RAM owners would be interested in.
1) The onboard computer lies about fuel economy, always overstating. My last trip, to the mountains above Fresno and back last weekend, was 3kish miles and I hand calculated each tank. Best was 17.2 (computer said 18.5), worst was 13.9 (computer said 15.4, 85mph on cruise into a headwind). I didn't sum the whole trip, but I'd say it gets ~16 overall, making no attempt whatsoever to conserve and driving on western interstates at the limit + 6. Unless the limit is 80 mph, in which case, +5 because the nanny cruise says no mas.
2) I ran into an engineer who left Cummins last year, and we had a fascinating chat about deleting and so on. When the truck is doing regen, it injects 4x more fuel into the exhaust than into the engine. He said 4-5mpg overall is a decent guess, although it will vary by use. He also said they spent a huge amount of time trying to avoid DEF, but couldn't meet the mandates without it, even with crazy high injection pressures and so on.
3) I'm curious for information about front bumpers. I planned on building a minimal front pushbar to mount the 30" Onyx from Baja Designs, but then I stalled because I can't figure out how I want to design/ attach it. I don't want a winch, I don't want some of the more cyborg looking things out there- Are there any bumpers that maintain the stock parksense? I'm not even sure where to look beyond 4WP... recommendations sought!
The list of projects remaining is long- wheels, tires, suspension, fabbing under-mount boxes, more tie downs inside, etc etc etc. At least it is usable so it has entered a more enjoyable/ elective phase of work!